LOGGER.finer("Determining user attributes for: "+op);
String token = (String)session.getAttribute(ATTR_TOKEN);
String tokenSecret = (String)session.getAttribute(ATTR_TOKEN_SECRET);
Twitter twitter = new Twitter();
twitter.setOAuthConsumer(provider.getConsumerKey(),provider.getConsumerSecret());
AccessToken accessToken = twitter.getOAuthAccessToken(token,tokenSecret);
twitter.setOAuthAccessToken(accessToken);
twitter4j.User tUser = twitter.verifyCredentials();
String screenName = Val.chkStr(tUser.getScreenName());
if (screenName.length() > 0) {
username = screenName+"@twitter";